【作者】 庞博；

【导师】 邱龙臻；

【作者基本信息】 合肥工业大学 ， 髙分子化学与物理， 2016， 硕士

【摘要】 共轭高分子半导体聚合物凭借其优良的电学性能,被广泛的应用于有机薄膜晶体管、有机光伏电池、有机电致发光二极管等诸多领域。聚噻吩及其衍生物因为其易于制备和良好的环境稳定性,一直是一种非常热门的有机半导体材料。联烯当中含有连双键,可以通过双键的1,2和/或2,3的连双键聚合,这种全新的结构有望赋予嵌段聚合物以全新的性能,从而为制备各种聚噻吩功能材料提供更广阔的选择范围。本文采用Ni(dppp)Cl2作为单一催化剂,首先通过GRIM法催化聚合了含有活性镍封端的聚(3-己基噻吩),然后在不改变反应体系的情况下,向其中加入了联烯单体进行聚合,最后又向其中加入了噻吩单体,完成了聚(3-己基噻吩)-聚十六烷氧基联烯-聚(3-己基噻吩)三嵌段聚合物的聚合。嵌段聚合物具有较低的分子量分布,同时不同嵌段比嵌段聚合物的分子量与单体对引发剂的进料比是相关的,说明了这种聚合反应是活性可控的。我们使用核磁共振氢谱,体积排除色谱法,傅里叶红外光谱法对反应进行监测和表征,使用紫外-可见光谱,热重分析,差示扫描量热法等方法对聚合物的特性进行分析。通过旋涂法制备了嵌段聚合物的底栅顶接触的薄膜晶体管器件,研究了热退火温度对于薄膜晶体管器件性能的影响,同时研究了相同分子量不同嵌段比,相同嵌段比不同分子量对于器件性能的影响。同时使用原子力显微镜和透射电子显微镜对于嵌段聚合物薄膜的结构进行了研究。试图找出其载流子传输机理。更多还原

【Abstract】 Conjugated semiconducting polymers, by virtue of its excellent electrical properties, is widely used in organic thin-film transistors, organic photovoltaic cells, organic light-emitting diodes and other fields. The polythiophene and its derivatives is a kind of conductive polymers as easy preparation and better stability. It is a very popular polymer semiconductor materials. Allenes reported bearing double bonds in the molecular structure. Though 1,2 or/and 2,3 polymerization of the cumulative double bonds. This novel structure is expected to endow polymers with special performance, as to provide a wider selection of the functional polythiophene materials.In this paper, we used Ni(dppp)Cl2 as the single catalyst. synthesized the Ni(Ⅱ)-terminated P3HT via the Ni-catalyzed Grignard metathesis(GRIM), then we keep the reaction system and sequentially feeding the allenes and the thiophene. Finally we got poly(3-hexylythiophenes)-b-poly(alkoxyallenes)-b-poly(3-hexylythiophenes) triblock copolymers. We obtain copolymers,which were obtained in relatively low polydispersitises and Mn’s proportional rely to the feed ratio of monomer to initiator. And then we prove that this polymerization is living and controlled polymerization. We using the size exclusion chromatography(SEC) and the 1HNMR and FT-IR to monitor the reaction process and characterization of the compounds. We used the UV-Vis, DTG,DSC to analysis the properties of the polymers.The bottom gate and top contact organic thin-film transistor based on the block copolymer were prepared by spin coating. We study on the influence of the OTFT performance with the different thermal annealing temperatures. And we also study the influence of the OTFT performance with the different block ratio of P3HT and PHA under the same molecular and different molecular under the same block ratio of P3HT and PHA. We used the TEM to analysis the structures of the copolymer thin-films. Trying to figure out the carrier transport mechanism of the copolymer thin-films.更多还原